Table 1. Virus strains generated by reverse genetics and the amino acids comparison of NAa.
Virus | NA Gene | Length | Homologya (%) | Enzyme acitivity |
rPR8-H5N1NA | H5N1 | 469 | 71.4 | 1∶10 |
rPR8-H9N2NA | H9N2 | 466 | 30.9 | 1∶10 |
rPR8-H1N1NA | Swine-H1N1 | 449 | 61.5 | <1∶10 |
PR8-wt | PR8 | 454 | 1∶10 |
The amino acids homology of wild-type PR8 virus and those of the H5N1, H9N2 or swine-H1N1.